该文对末敏弹系统全充满旋转减速伞的运动特性进行研究。
The motion characteristics of full developed rotational deceleration parachute of the system are studied in this paper.
月球曾被认为它形成的时候与地球的距离比现在要近，而且旋转比现在更快，它的减速和离去是因为长期和地球发生相互的潮汐的作用导致。
The moon is thought to have formed closer to the Earth than it is now and spun faster, slowing down and moving away over time through tidal interactions with Earth.
这使旋转耗时两秒钟，缓慢启动，加速，然后在最后再次减速。
This makes the rotation take two seconds, starting out slowly, accelerating, and then slowing down again at the end.
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